зеркало из https://github.com/mozilla/moz-skia.git
52 строки
1.4 KiB
C++
52 строки
1.4 KiB
C++
|
|
/*
|
|
* Copyright 2009 The Android Open Source Project
|
|
*
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
|
|
#ifndef SkEdgeClipper_DEFINED
|
|
#define SkEdgeClipper_DEFINED
|
|
|
|
#include "SkPath.h"
|
|
|
|
/** This is basically an iterator. It is initialized with an edge and a clip,
|
|
and then next() is called until it returns kDone_Verb.
|
|
*/
|
|
class SkEdgeClipper {
|
|
public:
|
|
bool clipQuad(const SkPoint pts[3], const SkRect& clip);
|
|
bool clipCubic(const SkPoint pts[4], const SkRect& clip);
|
|
|
|
SkPath::Verb next(SkPoint pts[]);
|
|
|
|
private:
|
|
SkPoint* fCurrPoint;
|
|
SkPath::Verb* fCurrVerb;
|
|
|
|
enum {
|
|
kMaxVerbs = 13,
|
|
kMaxPoints = 32
|
|
};
|
|
SkPoint fPoints[kMaxPoints];
|
|
SkPath::Verb fVerbs[kMaxVerbs];
|
|
|
|
void clipMonoQuad(const SkPoint srcPts[3], const SkRect& clip);
|
|
void clipMonoCubic(const SkPoint srcPts[4], const SkRect& clip);
|
|
void appendVLine(SkScalar x, SkScalar y0, SkScalar y1, bool reverse);
|
|
void appendQuad(const SkPoint pts[3], bool reverse);
|
|
void appendCubic(const SkPoint pts[4], bool reverse);
|
|
};
|
|
|
|
#ifdef SK_DEBUG
|
|
void sk_assert_monotonic_x(const SkPoint pts[], int count);
|
|
void sk_assert_monotonic_y(const SkPoint pts[], int count);
|
|
#else
|
|
#define sk_assert_monotonic_x(pts, count)
|
|
#define sk_assert_monotonic_y(pts, count)
|
|
#endif
|
|
|
|
#endif
|